This attenuator has two knobs for tonal control. The main volume is controlled by the Lows-Mids knob. Then to control the treble, use the Mids-Highs knob. The treble control is always dependent on the main volume control. Be aware that the higher the setting on the main knob, the less the effect of the treble compensation. For instance, if you turn the main knob all the way to 10, you’ll notice very little change in the tone as you turn the treble compensation from one end to the other. The line out signal is dependent on your amplifier settings.
May be used on 4, 8, and 16 ohm amplifiers. Includes MASS bypass, line out, extra output jack, and range switch. Two power level controls, one for the bass-mid frequencies and one for the upper mids-treble frequencies. They may be adjusted independently for the best tone at all levels of attenuation. These controls affect the actual signal going to the speaker, not the line out signal. So, it is like having high level tone controls. The controls are very effective and the tonal combinations are virtually infinite. Because a MASS motor is employed, a more realistic interaction between the attenuator and the output circuit of the amp occurs. The attenuation is continuously adjustable from-3dB to over -70db using speaker control and the range switch.
Like all Weber attenuators, setting the speaker control to minimum (maximum attenuation), allows the MASS Lite to be used as a dummy load for testing or for DI use.
Optional wings may be employed for rackmounting the MASS Lite. Attach these wings to the sides of your attenuator, and you can mount it in a standard 19″ rack. Uses two rack spaces. Must place the attenuator on the topmost spaces of the rack to allow proper ventilation.
Line Out jack has no volume control and is dependent on your amp volume setting, but we do offer a Line Level Volume Control here:
There is an option to add a headphone output, and this adds an extra jack with an independent volume control. For the footswitch option, we install a relay which requires 7.5V external power. This only powers the relay – the attenuator itself is still passive. We include the power plug but the footswitch itself is not included. You can use any latching footswitch, including one incorporated in a multi-effect floor unit.
This item is hand-built to order, to ensure the best attention to detail is paid to its construction. We build them one at a time, on a table – not hundreds at a time on an assembly line. This allows us to reduce the margin for error and produce an overall higher-quality product. Please allow at least 7-10 business days for your order to be built and then shipped.
IMPORTANT NOTE ABOUT HIGH GAIN AMPS*: *if you have a Fender or similar amp, and play with cleaner tones, this part does not apply to you. High gain amps such as Marshall or clones (with heavy distortion) are hard on attenuators. Unfortunately, an amp’s volume dial is not a good indicator of how much power is being produced. Many amps can reach full power at 3 or 4 on the volume dial, so it is a good suggestion to get an attenuator with 4x the power handling. For example, if you have a 50w high gain amp, you should opt for the MASS 200. If you have a 100w amp, you should still go with the MASS 200 but you should not crank the amp.
1) do not attenuate too far down. this puts a lot of power through a very small section of the volume rheostat which can cause it to fail
2) also do not turn your amp all the way up. even if you’re just knocking a little off the top with the attenuator, it’s a good idea to keep the amp somewhere in the middle at most. it’s best to find the lowest volume on the amp that is the acceptable tone to you, and then use the attenuator to bring it the rest of the way.
CABLES: for combo amps, most people like to set the unit on top of the amp. sometimes there is enough slack in the speaker wire to reach and sometimes there isn’t. these cables will make it work for you: GMC2P and GMC2E If the speaker is hardwired, then you need the PV30MH. (click the links to view them, and add to your order if you need them.)